After the third helicopter is downed, revel in your little victory, because it won't last long. You'll be ordered towards the second helicopter staging area. Since you now know what to expect, try to find an RPG to wield before you even get there. Once you arrive in the staging area's vicinity, you'll be free to go after more helicopters. There are at least seven or eight of them to destroy this time, not three, but as usual, things aren't too hectic. This is primarily because not all of the helicopters appear on-screen at once, but after a certain number of them have already been destroyed. As usual, keep an eye on your HUD for red skull icons, which in this case represent the helicopters you must go after.

A good point in which to spring off from through the duration of the fourth objective is atop the arena-like structure on the eastern edge of Chelsea. There are plenty of RPG-wielding soldiers here, and most of the helicopters fly over or around this very building. In fact, if you're disguised as a soldier yourself, it seems you can rough up any soldier you want to steal his rocket launcher and destroy their own helicopters with relative immunity. If a chopper or two seems to be getting out of your view, be sure to chase after it rapidly. Do depend on your rockets, though, as they can travel a great distance. If you can lock-on to a helicopter and launch your rocket, chances are it's going to strike its target.

At this point in the mission, you should be plenty used to what you need to do. Go to the third staging area. When you get nearby, helicopters will begin to take off, and you'll need to take them out as usual. For us, the military seemed to be more aware of our presence than ever, so this is going to necessitate that you keep moving to avoid being rapidly brutalized by their various heavy weaponry. Thankfully, there are only four choppers to deal with this time around, and all can be easily dispatched. For extra style points, glide towards a helicopter and shoot your rocket midair. When the fourth helicopter in this sequence has been destroyed, the mission will conclude. We're getting very close to the end.